Concentrator.



no; 675,799. Patented lune 4, l90l. E. A. SPEBRY. couceunnon.

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(Application filed Sept. 11, 1900.)

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No. 675,799. Patented lune 4, I91". E. A. SPERRY.

GONCENTRATOR.

(Application flied Sept. 11, 1900.)

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Patented June 4, l90l.

E. A. SPERRY. GONGENTRATOR. Applicationfiled Sept. 11, 900.3 (lloIodel.) 4 Sheets-Sheet 4.

IN VE NTOR WITNESSES l I M BY %YS Tm: mus PETER on v ml'o-uvna. wunnm'm.a. c.

UNITED STATES PATENT OFFICE.

ED\VIN A. SPERRY, OF BIVVABIK, MINNESOTA, ASSIGNOR, BY MESNEASSIGNMENTS, TO THE SIERRY VANNING- IUDDLE COMPANY, OF

COLORADO.

CONCENTRATO R.

SPECIFICATION formingpart of Letters Patent No. 675,799, dated June 4,1901. Application filed September 11,1900. Serial No. 29,645. (Nomntlelfl To all whom it may concern.-

Be it known that I, EDWIN A. SPERRY, a citizen of the United States, anda resident of Biwabik, in the county of St. Louis and State ofMinnesota, have invented a new and Improved Concentrator, of which thefollowing is a full, clear, and exact description.

This invention relates to improvements in machines for the concentrationof ore-tailings or other material in which a separation of particles ofdifferent specific gravity is required; and the object is to provide amachine of this character that shall be of simple construction and bymeans of which the values maybe rapidly and completely separated fromthe ore.

I will describe a concentrator embodying my invention and then point outthe novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a partofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a sectional elevation of a concentrator embodying myinvention. Fig. 2 is a top plan view. Fig. 3 is a section on the line a:of Fig. 1. Fig. 4 is a plan view with the table removed. Fig. 5 is aside elevation of the table-lifting device. Fig. (3 is a section on theline 111 of Fig. 5. Fig. 7 is a plan View of the table-lifting device.Fig. 8 is a side view of a track-supporting standard employed. Fig. 9 isa front View thereof. Fig. 10 is a View of a movable saddle foradjusting the point of division, and Fig. 11 is a section on the line .22 of Fig. 1.

Referring to the drawings, 1 designates a stationary base-frame uponwhich are mounted to rotate an intermediate frame 2 and an upper frame3. Rollers 4 are supported in brackets on the lower frame and engagewith an angle-iron track 5, attached to the under side of theintermediate frame 2. It is designed that while the upper frame 3rotates with the intermediate frame 2 the said upper frame, whichcarries the table to be hereinafter described, shall have an eccentricand vanning motion. For this purpose the upper frame 3 is mounted on aneccentric portion 6 of a shaft 7. The degree of eccentric move ment maybe regulated by means of an eccentric sleeve 8, secured to the eccentricportion (3 of the shaft by means of a bolt or the like and engaging withthe hub 9 of said upper frame. The shaft 7 extends down through theintermediate frame 2 and has a step-bearing in aboxing 10, attached tothe lower frame Motion is imparted to the shaft from a driving-shaft 11,having a bevel-pinion 12 engaging with a bevel-pinion 13, attached tothe shaft 7, and rotary motion is imparted to the two frames from adriving-shaft 14, having a bevel-pinion 15 engaging with a bevelgear 16,attached to the intermediate frame. The gearing for rotating the twoframcs-that is, the upper and intermediate frames-is so related to thegearing for rotating the shaft that the shaft shall have a faster motionthan the two frames. In other words, when the machine is in operationthe vanning motion imparted to the table supported by the rotary frameswill be faster than the rotary motion. The frames 2 and 3 are connectedat suitable points by springs 17, and the two frames are held inparallelism by links 18, engaging with eyebolts attached to the twoframes, as plainlyindicated in the drawings. The concentrator-tableconsists of a number of strips of wood 19 or the like placed closely together and forming a circular table. Attached to the upper side of thestrips forming the table is a covering 20, of any suitable materialsuch,for instance, as rubber, linoleum, or the like. The object-in making thetable of the several stripsis to provide for the adjustment of its pitchfrom its center outward, so that the material may be washed off the samewith greater or less speed, as required. As a means for causing the saidadjustments of the table I employ a lifting-rod 2i, havinga disk 22 atits top, which engages the under side of the table at its center, asindicated in Fig. 1. Mounted in the lower end of the lifting-rod 21 is aroller 23, having its journals extended into slots 21 in guide-plates25, attached to the frame These guide-plates are supported by inclinedbraces 26, and movable between the guide-plates and underneath theroller 23 is an inclined lifter 27. At one end this lifter 27 has anupward extension 28, pro vided with a tapped hole in which a screwrod 29engages. The said screw-rod extends outward through a bearing 30 and hasa handwheel at the outer side of the machine. Obviously by rotating thescrew-rod 29 the incline 27 will be moved underneath the roller 23,causing said roller, and consequently the rod 21, to move up or down,depending upon the direction in which the screw-rod is retated, and thisobviously will cause the pitch adjustments of the table.

The table is supported near its outer edge by a circular rail 31,supported by standards 32, connected to the frame These standardsconsist of strips of metal, the two ends of which are provided withyoke-sections to engage with the rail, and for engaging the railtherewith the two members or sections of a standard may be separated orsprung away from each other, as indicated by the dotted lines in Fig. 8,and then when moved together may be tightly clamped to the rail by meansof a bolt.

Arranged above the table at the center is a distributing-box 33, formedin the segment of a circle and provided with a series of partitions 34,dividing it into a series of compartments, and each compartment has anoutlet 35 for discharging onto the table-top. The crushed ore or othermaterial is fed to the distributing box through a chute 30. A spray-pipe37 extends over the top of the table, and it is provided at its underside with perforations through which the water discharges. The materialdischarged from the table falls into a circular receiving-trough 38,provided atintervals with partitions dividing the said trough intoseveral sections, and each section has an outlet 39, which may benormally closed by a plug or the like.

In operation the material to be treated is mixed with water anddelivered on the surface of the table from the distributing-box. Byadjusting the conical pitch of the tabletop the ore-pulp or othermaterial is allowed to flow down toward the edge of the table, while thevanning or agitating motion, together with the action of the water mixedwith the pulp, gives the particles an opportunity to separate accordingto the specific gravity of each, the heavier particles settling on thetable-top, while the lighter particles remain on the top of said heavierparticles. The revolving motion of the table moves the material sodeposited on the table, and the spray from the pipe 87 will. wash offthe upper and lighter portions of the material deposited and leave theheavier portions or values on the surface of the table and which in turnare washed off into suitable receptacles.

I divide the trough 38 into compartments, as I find by experience thatthe components of the material deposited on the table -such as silica orsand, zinc, iron, copper, and leadhaving varying degrees of specificgravity, will separate and discharge in streaks and fall each one intoits particular compartment, and to regulate the points of division I mayemploy in connection with the partitions the saddles a, (shown in Fig.10,) which are shiftable over the fixed partitions.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. In a concentrator, a base, an intermediate frame,and an upper frame, a shaft on which the intermediate frame is mountedto rotate, the said shaft having an eccentric portion on which the upperframe is mounted, a gearing for rotating the intermediate frame on theshaft, a gearing for rotating the shaft, and a table supported on theupper frame, the said two frames and the table being rotated together,substantially as specified.

2. In a concentrator, a circular table consisting of a number ofseparate strips extending from the center outward, a cover of rubber orthe like on said strips, a lifting-rod, a disk on said lifting-rodengaging with the under side of said strips near the center, a rollercarried by said rod, a guide for the rod, an inclined plate for engagingwith the roller, and a screw-rod for adjusting said plate, substantiallyas specified.

3. In a concentrator, a base-frame, an intermediate frame and an upperframe, springyielding connections between the intermediate and the upperframes, a shaft extended through the intermediate frame and having aneccentric portion on which the upper frame is mounted, means forrotating said shaft, means for rotating the two frames above thebase-frame, and a table supported on the upper frame, substantially asspecified.

4. In a concentrator, a base-frame, an intermediate frame, an upperframe, springyielding connections between the intermediate and upperframes, means for holding the said intermediate and upper frames inparallelism, means for rotating the said intermediate and upper frames,means for causing an eccentric motion of the upper frame, and a tablesupported on the upper frame, substantially as specified.

5. In a concentrator, a rotating and vanning frame, a circularsupporting bar or rod mounted on said frame, a table supported by andslidable on said bar or rod, a deliverybox above the center of thetable, and a spray pipe over the table, substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

EDWIN A. SPERRY.

Vitnesses:

C. W. STARK, W. W. BRowNE.

